近零材料特性及应用探讨  

Properties of Epsilon-Near-Zero Materials and its Potential Application

作　　者：吴中元[1] 黄铭[1] 杨晶晶[2] 余江[1] 彭金辉[2] 

机构地区：[1]云南大学信息学院,云南昆明650091 [2]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《中国激光》2009年第2期458-461,共4页Chinese Journal of Lasers

基　　金：教育部重点项目(208133);云南省自然科学基金(2007F005M);云南省教育厅基金(07Z10875);国家自然科学基金重点项目(50734007);国家973计划(2007CB613606)资助课题

摘　　要：分析了二维平行板波导与近零材料(ENZ)的电磁相互作用,证实了近零材料的电磁压缩和超耦合效应。通过改变近零材料区平行板波导的几何形状,发现二维平行板波导存在低频谐振峰、特征峰和高频谐振峰,低频峰的位置由近零材料决定,高频峰的位置由几何形状决定。在超耦合区填充不同介电常数的材料,发现谐振峰产生红移,并且低频峰位于特征峰的左侧。基于近零材料的特性,提出光传感器和光功分器两个应用方案,在1.2～2μm波段,光传感器的灵敏度为△λ/△ε=100nm;在1.3μm波段,光功分器的插入损耗接近0 dB。仿真结果表明近零材料具有特异的电磁性能,可用于设计光传感器和光分配器,有望在光通信和光电子器件领域得到广泛应用。The interaction of epsilon-near-zero （ENZ） materials with two dimensional parallel-plate waveguide has been analyzed. Electromagnetic wave energy squeezing and supercoupling effects are verified using the full wave simulations. Lower-frequency resonant peak, characteristic peak, higher-frequency resonant peak was observed by varying the shape of the waveguide filled with ENZ materials. It is shown that the position of lower-frequency resonant peak is dependent on ENZ materials, and the position of higher-frequency resonant peak is dependent on Fabry-Perot resonances. Red shift of the resonant peak is observed by selective tuning the permittivity of the materials in the supercoupling region, and lower-frequency resonant peak is on the left-hand side of characteristic peak. Based on the properties of ENZ materials, two potential applications for optical sensor and optical power divider are suggested and numerically studied. In the wavelength range of 1.2 - 2 um, sensitivity of the optical sensor is △λ/△ε=100 nm; Insertion loss of the optical power divider is 0 dB at 1.3 um. Simulating results show that ENZ materials with intriguing electromagnetic properties are favorable for the tailoring optical sensor and power divider, and may have interesting potential applications in optical communication and optoelectronics devices.

关 键 词：物理光学 近零材料 有限积分法 光传感器 光分配器 

分 类 号：O436[机械工程—光学工程]